Q.

Select the correct statement.

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a

A fall in GFR activates macula densa to release renin.

b

Angiotensin II decreases glomerular blood pressure.

c

Renin converts angiotensin I to angiotensin II.

d

Atrial natriuretic factor is a vasodilator.

answer is D.

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Detailed Solution

Atrial Natriuretic Factor (ANF) can cause vasodilation and thereby decrease blood pressure.
A fall in GFR activates JG cells to release renin.
Angiotensin II, being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
Renin converts angiotensinogen to angiotensin I. Angiotensin converting enzyme (ACE) converts angiotensin I to angiotensin II.

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